LM193DRG4 Equivalent & Substitute Parts

Part Overview

The LM193DRG4 is a general-purpose dual comparator IC manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. This device features open-collector, rail-to-rail output configuration and operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply). The LM193DRG4 is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	LM193DRG4 Specification
Manufacturer	Texas Instruments
Package / Case	8-SOIC (0.154", 3.90mm Width)
Type	General Purpose Comparator
Number of Elements	2
Output Type	Open-Collector, Rail-to-Rail
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	5mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	2.5mA
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LM193DRG4 are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Dual comparator configuration (2 elements)
Open-collector output type
8-pin SOIC package footprint (0.154" width, 3.90mm)
Supply voltage range compatibility (minimum 2V ~ 36V single supply)
Input offset voltage specification (5mV or better)
Input bias current specification (0.25µA or better @ 5V)
Surface-mount technology
ROHS3 compliance

Substitute parts are grouped into two categories: parametric equivalents (matching all key electrical specifications) and manufacturer-recommended alternatives (meeting functional requirements with minor specification variations in operating temperature or output current).

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Product Status
LM193DRG4	Texas Instruments	8-SOIC (0.154")	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-55°C ~ 125°C	Discontinued
LM193DR	UMW	8-SOP	2V~32V, ±1V~16V	5mV	250nA	16mA	1mA	-55°C ~ 125°C	Active
AS393AMTR-E1	Diodes Incorporated	8-SOIC (0.154")	2V~36V, ±1V~18V	3mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
AS393AMTR-G1	Diodes Incorporated	8-SOIC (0.154")	2V~36V, ±1V~18V	3mV @ 1.4V	0.4µA @ 5V	16mA	1mA	-40°C ~ 85°C	Active
AS393MTR-E1	Diodes Incorporated	8-SOIC (0.154")	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
AS393MTR-G1	Diodes Incorporated	8-SOIC (0.154")	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
BA10393F-E2	Rohm Semiconductor	8-SOP (0.173")	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
BA2903F-E2	Rohm Semiconductor	8-SOP (0.173")	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 125°C	Active
BA2903SF-E2	Rohm Semiconductor	8-SOP (0.173")	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 105°C	Active
LM193DT	STMicroelectronics	8-SOIC (0.154")	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	18mA @ 5V	2.5mA	-55°C ~ 125°C	Active
LM2903DR	UMW	8-SOP (0.154")	2V~30V, ±1V~±15V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Active

Engineering Selection Recommendations

Primary Substitute: LM193DT (STMicroelectronics)

The LM193DT is the closest functional equivalent to the LM193DRG4. It maintains identical electrical specifications including input offset voltage (5mV @ 30V), input bias current (0.25µA @ 5V), quiescent current (2.5mA), and operating temperature range (-55°C ~ 125°C). The package footprint is identical (8-SOIC, 0.154" width). Both devices feature open-collector, rail-to-rail output and are ROHS3 compliant with MSL 1 rating. The LM193DT is currently in active production status with substantial inventory availability.

Secondary Substitutes: AS393MTR-E1 and AS393MTR-G1 (Diodes Incorporated)

These parts provide full electrical compatibility with the LM193DRG4 across the critical supply voltage range (2V~36V, ±1V~18V) and maintain the same input offset specification (5mV @ 5V) and input bias current (0.25µA @ 5V). Both use the correct 8-SOIC package footprint. The operating temperature range is narrower (-40°C ~ 85°C), which may be a constraint for extended-temperature applications. Both are ROHS3 compliant and actively produced with high inventory levels.

Alternative Substitutes: BA10393F-E2 and BA2903F-E2 (Rohm Semiconductor)

These parts meet all functional requirements but use an 8-SOP package with slightly larger width (0.173" vs. 0.154"). PCB layout verification is required to confirm footprint compatibility. BA2903F-E2 extends the operating temperature to -40°C ~ 125°C, matching the original device's lower temperature limit. Both maintain ROHS3 compliance and are actively produced.

Limited Compatibility: LM2903DR (UMW)

This part has reduced supply voltage range (2V~30V single supply, ±1V~±15V dual supply) compared to the LM193DRG4 (2V~36V, ±1V~18V). Operating temperature is also restricted to 0°C ~ 70°C. Use only if application requirements fall within these narrower specifications.

Frequently Asked Questions (FAQ)

Q: Can I use AS393AMTR-E1 or AS393AMTR-G1 as direct replacements for the LM193DRG4?

A: Both parts are electrically compatible with the LM193DRG4 in the 8-SOIC package. However, the operating temperature range is narrower (-40°C ~ 85°C vs. -55°C ~ 125°C). Verify that your application does not require operation below -40°C or above 85°C. Both parts are ROHS3 compliant and actively produced.

Q: What is the difference between AS393AMTR-E1 and AS393MTR-E1?

A: Both parts are manufactured by Diodes Incorporated in 8-SOIC packages with identical supply voltage ranges and input offset specifications. AS393AMTR-E1 specifies input offset at 3mV @ 5V, while AS393MTR-E1 specifies 5mV @ 5V. Both meet the LM193DRG4 requirement of 5mV maximum input offset. AS393MTR-E1 has higher inventory availability (354,160 pcs vs. 232,200 pcs).

Q: Can I use BA10393F-E2 or BA2903F-E2 if my PCB is designed for the standard 8-SOIC footprint?

A: These Rohm parts use an 8-SOP package with a slightly larger width (0.173" vs. 0.154"). While the pin pitch is compatible, the package body dimensions differ. PCB layout verification is required to confirm that the larger package body does not interfere with adjacent components or board constraints.

Q: Is the LM193DT a suitable replacement for high-temperature applications?

A: Yes. The LM193DT maintains the full operating temperature range of the LM193DRG4 (-55°C ~ 125°C) and is electrically identical. It is manufactured by STMicroelectronics and is currently in active production with 78,081 pcs in stock. This is the recommended choice for applications requiring extended temperature operation.

Q: Why does the LM2903DR have a narrower supply voltage range?

A: The LM2903DR is specified for 2V~30V single supply and ±1V~±15V dual supply, which is narrower than the LM193DRG4 (2V~36V, ±1V~18V). Additionally, the operating temperature is limited to 0°C ~ 70°C. This part is suitable only for applications that do not require the full voltage or temperature range of the original device.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the LM193DRG4.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?

A: MSL 1 (Unlimited) indicates no moisture sensitivity and no baking requirement before soldering. MSL 3 (168 Hours) requires baking if the part has been exposed to moisture for extended periods. The LM193DRG4 has MSL 1. Most substitutes also have MSL 1, except AS393MTR-E1 and AS393MTR-G1, which have MSL 3. For standard manufacturing processes, this difference is not critical.

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